Is CVE-2026-48843 actively exploited?

No active exploitation of CVE-2026-48843 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-48843 be exploited remotely?

Yes. CVE-2026-48843 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-48843?

CVE-2026-48843 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2026-48843

HIGH

CVE-2026-48843

CWE-918Published: May 25, 2026· Updated: May 26, 2026

7.2

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.0th

Official Description

Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.

NVD Source

Technical Analysis

CVE-2026-48843 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.